You have a long weekend and want to save some punya for your generations . Kanchi is the land of Vidhya - the best place on earth. Here is a list of temples you can cover in single day.
Chennai to Kanchi - If you are staying in Tambaram take the Oragadam, Wallajahpet route. Else Sriprerumpudur.
Kamakshi Amman Temple - the place where Kamakshi Amman did penace. Don't forget to watch Sri Poorna, Pushkala sameda Sastha (Ayyappan) inside the Temple .Go Puja (Cow Puja) is very famous and happens @ 5:00 am
Ulagalantha Perumal Temple, Kanchipuram is very close to Kamakshi amman temple, where Lord Vishnu kept the third feed on Maha Bali
Ekambareswarar Temple is where Lord Shiva resides. There is a old mango tree in this temple and the Idol of Lord Parvati and Lord Shiva beneath that is so real one. Watch the shyness of the Lordess and the Pride of Lord Shiva
Kumara Kottam Subrahmanya Temple, Kanchipuram is close to Ekambareshwar Temple and Sankara Mutt
Varadharaja Perumal Temple is on the other side of the city called Vishnu kanchi.. You can go there by evening and enjoy the beauty...